1QFB

THE CYCLIC PEPTIDE CONTRYPHAN-R FROM CONUS RADIATUS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST NOE & TOTAL ENERGY 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Solution structure of contryphan-R, a naturally occurring disulfide-bridged octapeptide containing D-tryptophan: comparison with protein loops.

Pallaghy, P.K.Melnikova, A.P.Jimenez, E.C.Olivera, B.M.Norton, R.S.

(1999) Biochemistry 38: 11553-11559

  • DOI: 10.1021/bi990685j
  • Primary Citation of Related Structures:  
    1QFB

  • PubMed Abstract: 
  • Contryphan-R is a disulfide-constrained octapeptide containing a D-tryptophan that was isolated recently from venom of the cone shell Conus radiatus. The polypeptide is present in two forms in solution due to cis-trans isomerization at hydroxyproline 3. The solution structure of the major form of this unusual polypeptide, determined from NMR data, consists of a well-defined fold containing a non-hydrogen-bonded chain reversal from Gly1 to Glu5, which includes a cis-hydroxyproline and a D-Trp, and a type I beta-turn from Glu5 to Cys8 ...

    Contryphan-R is a disulfide-constrained octapeptide containing a D-tryptophan that was isolated recently from venom of the cone shell Conus radiatus. The polypeptide is present in two forms in solution due to cis-trans isomerization at hydroxyproline 3. The solution structure of the major form of this unusual polypeptide, determined from NMR data, consists of a well-defined fold containing a non-hydrogen-bonded chain reversal from Gly1 to Glu5, which includes a cis-hydroxyproline and a D-Trp, and a type I beta-turn from Glu5 to Cys8. The presence of a putative salt bridge between the Glu5 carboxyl group and the N-terminal ammonium group is investigated by using various solvation models during energy minimization and is compared with the results of a pH titration. A comparison of the structure of contryphan-R with other cyclic peptide structures highlights some of the key structural determinants of these peptides and suggests that the contryphan-R fold could be exploited as a scaffold onto which unrelated protein binding surfaces could be grafted. Comparison with small disulfide-bridged loops in larger proteins shows that contryphan-R is similar to a commonly occurring loop structure found in proteins.


    Related Citations: 
    • Contryphan is a D-tryptophan-containing Conus peptide.
      Jimenez, E.C., Olivera, B.M., Gray, W.R., Cruz, L.J.
      (1996) J Biol Chem 271: 28002

    Organizational Affiliation

    Biomolecular Research Institute, Parkville, Australia.



Macromolecules

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (CONTRYPHAN-R)A9N/AMutation(s): 0 
UniProt
Find proteins for P58786 (Conus radiatus)
Explore P58786 
Go to UniProtKB:  P58786
Entity Groups  
UniProt GroupP58786
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HYP
Query on HYP
A L-PEPTIDE LINKINGC5 H9 N O3PRO
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST NOE & TOTAL ENERGY 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-09-29
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations
  • Version 1.4: 2019-11-27
    Changes: Database references, Derived calculations